To dream of an arm represents function, reach, or what’s possible. Arms reflect status, talents, grasp, or resources that are available to you or some aspect of yourself.
To dream of missing an arm represents a loss of function, reach, or an extension of yourself. Some area of your life is not able to function properly or is limited.
To dream of arms being crossed represents some aspect of yourself that is stubborn, opposed, or doesn’t need to cooperate.
To see muscular arms represents you or some aspect of your personality is resourceful or effective. Having the power to attain objectives, or “reach” for what you wants. Negatively, muscular arms can point to powerful or resourceful negative aspects of your personality. Beliefs or a situations that may be difficult to confront.
People who self-harm to their arms may see imagery in dreams of damage being done to their arms by “safe” or “trusted” friends along with dark colored imagery such as red, black, and dark blue. This symbolism reflect the person’s attempt to harm themselves as safely as they can to get the emotional benefits they seek from the cutting while also being mindful to not kill themselves.
Example: A woman dreamed of seeing her boyfriend cut off his arm in front of her. In waking life her boyfriend did special things for her that made her feeling uncomfortable and that he was behaving too nice to her. After telling him this once he stopped giving her special treatment. The arm being cut off may have reflected her feelings about “cutting off” her boyfriends willingness to try hard to do special things for her when she allowed her insecurity to criticize him.